Among candidates for state office, Kamala Harris is the only Democrat who's trailing in the polls. That means plenty of Democrats plan to split their ballots with a vote for moderate Republican Steve Cooley.

So in the closing week of the campaign, the Harris campaign is doing what it can to sharpen the partisan contrasts. And they're using a new independent ad, from the Republican State Leadership Committee, to link Cooley to Karl Rove.

Here's the ad, which began airing in Los Angeles on Sunday.

The Republican State Leadership Committee has dumped more than $1 million into the ad. The committee is chaired by Ed Gillespie, the former chair of the RNC, and is linked to Karl Rove.

The Harris campaign is sending a letter to the state Fair Political Practices Commission complaining that the ad fails to disclose the top two donors to the committee: the U.S. Chamber of Commerce and Altria (formerly Philip Morris). Harris will also be sending a letter to Steve Cooley, asking him to denounce the ad. (Don't hold your breath.)